Fig. 3From: A local QSAR model based on the stability of nitrenium ions to support the ICH M7 expert review on the mutagenicity of primary aromatic aminesEffect of activating and deactivating substituents on ΔΔE and mutagenicity of aromatic amines. The structures of mutagens are shown in red and those of nonmutagens in green. The numbers below the structures indicate ΔΔE values. The text in the squares shows the classification by Ahlberg et alBack to article page